The police have seized 10 kilogrammes of cocaine and arrested four people after an operation which has been ongoing for 10 months. A Belgian couple was arrested along with two Maltese men - a 38-year-old from Birkirkara and a 41-year-old from Safi. They are expected to be arraigned on charges of importing, trafficking and possession of drugs. The arrests were made in Msida after the police tailed the Belgian couple who had arrived earlier on the catamaran from Sicily.